Table 4 The values of α, factor loadings, floor, ceiling effects of weighted impact score for items of ADDQoL for patients with diabetes

Cronbach’s α

0.92

–

–

–

0.93

–

–

–

Cronbach’s α with deleted item:

0.92

–

–

–

0.93

–

–

–

Leisure activities

0.91

0.766

3.48

0.87

0.92

0.701

5.58

0

Working life

0.91

0.753

4.35

0

0.92

0.779

5.58

0

Journeys

0.91

0.772

4.35

0

0.92

0.736

4.65

0

Holidays

0.91

0.759

4.35

0

0.92

0.807

5.58

0

Physical health

0.92

0.703

8.70

0

0.92

0.719

5.58

0

Family life

0.92

0.704

4.35

0

0.92

0.765

4.19

0

Friendship and social life

0.92

0.693

3.48

0

0.92

0.652

2.33

0

Personal relationship

0.92

0.714

6.09

0

0.92

0.728

5.58

0

Sex life

0.92

0.512

5.22

0

0.92

0.713

6.98

0.47

Physical appearance

0.92

0.538

5.22

0

0.92

0.695

7.91

0

Self-confidence

0.92

0.723

6.09

0

0.92

0.801

6.51

0

Motivation

0.91

0.790

3.48

0

0.92

0.708

5.58

0

People’s reactions

0.92

0.646

2.61

0

0.92

0.656

1.86

0

Feelings about future

0.92

0.636

9.57

0

0.92

0.520

8.37

0

Financial situation

0.92

0.720

3.48

0

0.92

0.595

2.33

0

Living conditions

0.92

0.554

1.74

0

0.93

0.487

2.79

0

Dependence on others

0.92

0.392

8.70

0.87

0.92

0.584

6.05

0

Freedom to eat

0.92

0.490

9.57

0

0.93

0.418

10.23

0

Freedom to drink

0.92

0.477

10.43

0

0.93

0.346

8.37

0

% variance

–

43.5%

–

–

–

44.3%

–

–